Abstract: A shower drain replacement device for replacing existing shower drains in most shower stalls. The device includes a drain sleeve for inserting into a drain hole of a fixture, and having an open upper end and an open lower end and a peripheral side wall. A peripheral flange extends outwardly from the upper end for resting on a portion of the fixture adjacent to the drain hole. A plurality of mounting assemblies are provided for securing the drain sleeve in the drain hole of the fixture. Each of the mounting assemblies comprises an aperture in the flange of the drain sleeve, a support sleeve mounted on the drain sleeve, a rod extending through the aperture and through the support sleeve, and a mounting member rotatably mounted on the rod. The mounting member is rotatable between a retracted position and an extended position.